Which non-downtown expressway project took 10 to 20 years? The 407/412/418 east extension project was about 50 km. Construction started in 2012 on Phase 1, and in 2015 on Phase 2. The first 31-km (Phase 1 - 22 km of 407 and the 412) opened in 2016 (which had slipped from 2015) and the remaining 19 km opened in 2019.
This is all a rural area. It's not like they have to spend 2-years moving hundreds of kilometres of sewers and other utilities first.
The 413 length is about the same as the 407/412/418 project. Both have 4 or 5 complex expressway-expressway interchanges.
What have you heard that would make construction last 10 years, let alone 20 years?
At the same time though, I doubt that construction will start in 2025 - there's still no RFQ as far as I know. Looking at the last 4 major expressway projects (407 Phase 1, 407 Phase 2, 427 extension, 401 widening in the west), the projects took about 2 (and 2.5 in the case of the 401) years to go from RFQ to construction.
But under Ford (and I assume a more industry-led design - I haven't been following too closely), the twinning of the QEW bridge over the Welland canal, the RFQ was issued in 2022, and they don't plan to execute the contract until December 2026! So 2027 construction at best for the QEW.
On that schedule, I don't know how 413 construction would start until the late 2020s at least. Where did you see that it would start this year?